imp - One-line center the bottom text in opening

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To make things look consistent, we've used one-line centered writer for bottom text in the opening splash of the modern welcome screen.

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Type: imp
Breaking: False
Doc Required: False
Part: 1/1

public/Nitrocid/Misc/Splash/Splashes/Welcome.cs

@@ -86,7 +86,7 @@ public override string Opening(SplashContext context)
             builder.Append(
                 col.VTSequenceForeground +
                 CenteredFigletTextColor.RenderCenteredFiglet(figFont, text) +
-                CenteredTextColor.RenderCentered(consoleY - 1, bottomText)
+                CenteredTextColor.RenderCenteredOneLine(consoleY - 1, bottomText)
             );
             return builder.ToString();
         }